I am unsure about you question, I think we do need error handling, I think its important to be able to process any errors the script may produce in a controlled way instead of just farting out the fatal error to people, opening up a whole new pandoras box of problems including and not limited too: security problems and making your site look unprofessional.
Making your script fail gracefully very important, in my opinion.

Sorry if i have misunderstood.

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mysql> SELECT * FROM `users` WHERE `users`.`clue` > 0;
Empty set (0.00 sec)